django-orchestra/orchestra/api/helpers.py

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from django.urls import NoReverseMatch
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from rest_framework.reverse import reverse
def link_wrap(view, view_names):
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def wrapper(self, request, *args, **kwargs):
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""" wrapper function that inserts HTTP links on view """
links = []
for name in view_names:
try:
url = reverse(name, request=self.request)
except NoReverseMatch:
url = reverse(name, args, kwargs, request=request)
links.append('<%s>; rel="%s"' % (url, name))
response = view(self, request, *args, **kwargs)
response['Link'] = ', '.join(links)
return response
for attr in dir(view):
try:
setattr(wrapper, attr, getattr(view, attr))
except:
pass
return wrapper
def insert_links(viewset, basename):
collection_links = ['api-root', '%s-list' % basename]
object_links = ['api-root', '%s-list' % basename, '%s-detail' % basename]
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exception_links = ['api-root']
list_links = ['api-root']
retrieve_links = ['api-root', '%s-list' % basename]
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# Determine any `@action` or `@link` decorated methods on the viewset
for methodname in dir(viewset):
method = getattr(viewset, methodname)
view_name = '%s-%s' % (basename, methodname.replace('_', '-'))
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if hasattr(method, 'collection_bind_to_methods'):
list_links.append(view_name)
retrieve_links.append(view_name)
setattr(viewset, methodname, link_wrap(method, collection_links))
elif hasattr(method, 'bind_to_methods'):
retrieve_links.append(view_name)
setattr(viewset, methodname, link_wrap(method, object_links))
viewset.handle_exception = link_wrap(viewset.handle_exception, exception_links)
viewset.list = link_wrap(viewset.list, list_links)
viewset.retrieve = link_wrap(viewset.retrieve, retrieve_links)